1
let left = {
2
  key: ["a", "A"],
3
  isDown: false,
4
  isUp: true,
5
  pressEvent: function (e, obj) {
6
    if (this.key.includes(e.key)) {
7
      this.isDown = true;
8
      this.isUp = false;
9
    }
10
  },
11
  releaseEvent: function (e, obj) {
12
    if (this.key.includes(e.key)) {
13
      this.isDown = false;
14
      this.isUp = true;
15
    }
16
  },
17
};
18

19
let keyboard = [left];
20

21
window.addEventListener("keydown", function (event) {
22
  keyboard.forEach((item) => {
23
    item.pressEvent(event, userInput);
24
  });
25
});
26

27
window.addEventListener("keyup", function (event) {
28
  keyboard.forEach((item) => {
29
    item.releaseEvent(event, userInput);
30
  });
31
});